1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_POWERPC_NOHASH_TLBFLUSH_H 3 #define _ASM_POWERPC_NOHASH_TLBFLUSH_H 4 5 /* 6 * TLB flushing: 7 * 8 * - flush_tlb_mm(mm) flushes the specified mm context TLB's 9 * - flush_tlb_page(vma, vmaddr) flushes one page 10 * - local_flush_tlb_mm(mm, full) flushes the specified mm context on 11 * the local processor 12 * - local_flush_tlb_page(vma, vmaddr) flushes one page on the local processor 13 * - flush_tlb_range(vma, start, end) flushes a range of pages 14 * - flush_tlb_kernel_range(start, end) flushes a range of kernel pages 15 * 16 */ 17 18 /* 19 * TLB flushing for software loaded TLB chips 20 * 21 * TODO: (CONFIG_PPC_85xx) determine if flush_tlb_range & 22 * flush_tlb_kernel_range are best implemented as tlbia vs 23 * specific tlbie's 24 */ 25 26 struct vm_area_struct; 27 struct mm_struct; 28 29 #define MMU_NO_CONTEXT ((unsigned int)-1) 30 31 extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start, 32 unsigned long end); 33 34 #ifdef CONFIG_PPC_8xx 35 static inline void local_flush_tlb_mm(struct mm_struct *mm) 36 { 37 unsigned int pid = READ_ONCE(mm->context.id); 38 39 if (pid != MMU_NO_CONTEXT) 40 asm volatile ("sync; tlbia; isync" : : : "memory"); 41 } 42 43 static inline void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr) 44 { 45 asm volatile ("tlbie %0; sync" : : "r" (vmaddr) : "memory"); 46 } 47 48 static inline void local_flush_tlb_page_psize(struct mm_struct *mm, 49 unsigned long vmaddr, int psize) 50 { 51 asm volatile ("tlbie %0; sync" : : "r" (vmaddr) : "memory"); 52 } 53 54 static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end) 55 { 56 start &= PAGE_MASK; 57 58 if (end - start <= PAGE_SIZE) 59 asm volatile ("tlbie %0; sync" : : "r" (start) : "memory"); 60 else 61 asm volatile ("sync; tlbia; isync" : : : "memory"); 62 } 63 #else 64 extern void flush_tlb_kernel_range(unsigned long start, unsigned long end); 65 extern void local_flush_tlb_mm(struct mm_struct *mm); 66 extern void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr); 67 void local_flush_tlb_page_psize(struct mm_struct *mm, unsigned long vmaddr, int psize); 68 69 extern void __local_flush_tlb_page(struct mm_struct *mm, unsigned long vmaddr, 70 int tsize, int ind); 71 #endif 72 73 #ifdef CONFIG_SMP 74 extern void flush_tlb_mm(struct mm_struct *mm); 75 extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr); 76 extern void __flush_tlb_page(struct mm_struct *mm, unsigned long vmaddr, 77 int tsize, int ind); 78 #else 79 #define flush_tlb_mm(mm) local_flush_tlb_mm(mm) 80 #define flush_tlb_page(vma,addr) local_flush_tlb_page(vma,addr) 81 #define __flush_tlb_page(mm,addr,p,i) __local_flush_tlb_page(mm,addr,p,i) 82 #endif 83 84 #endif /* _ASM_POWERPC_NOHASH_TLBFLUSH_H */ 85